Results 61 to 70 of about 3,452,326 (230)

Research on the Influence of Shield Tunneling Parameters on Buildings Side-passed by Overlapping Tunnels

Chengshi guidao jiaotong yanjiu
ObjectiveThe influence of shield tunneling parameters (upper chamber and shield tail grouting pressures) for the subsequent line of overlapping tunnels on existing buildings is analyzed to provide a reference for similar projects.
Lin YANG, Jiang GONG, Zhiyong XIN, Nan XIANG, Zhe HUANG, Tengyue ZHENG, Shuying WANG   +6 more
doaj   +1 more source

Influence of Ambient Pressure on the Jet-Ignition Combustion Performance and Flame Propagation Characteristics of Gasoline in a Constant Volume Combustion Chamber

Energies
Based on a constant volume combustion chamber, the initial ambient pressure effect on gasoline combustion performance and flame propagation of the active and passive pre-chamber ignition systems were studied.
Zongjie Hu, Minglong Li, Xinke Miao, Zhiyu Wang, Yuanzhi Tang, Xijiang Wu, Wangchao Yu, Zhe Kang, Jun Deng   +8 more
doaj   +1 more source

Hot Test Studies in a Spark Ignited Vortex Combustion Chamber

Chemical Engineering Transactions, 2018
Hot tests are performed in a vortex combustion chamber using gaseous oxygen and gaseous hydrogen as the propellants by varying their mixture ratios, and nozzle throat diameter.
Rajesh Thalappil Naduvilethil, Sarvoththama Jothi Thurvas Jegathjothi, Jayachandran Thankappan   +2 more
doaj   +1 more source

Thermal Cycle–Microstructure–Property Relationships in Rail Steel Heat‐Affected Zone Simulated by Gleeble

Advanced Engineering Materials, EarlyView.
Microstructural evolution of premium rail steel during flash butt welding (FBW), comparing physically simulated heat‐affected zones with actual weld regions. Thermal cycles induce phase transformations and microstructural heterogeneity that influence weld quality and mechanical performance. These findings provide insights into optimizing FBW parameters
Emmanoelle Cintra da Cunha Araújo, João Marcos da Silva Nunes, Marcelly Cristiny Nunes de Carvalho, Alex Rojas, Cristie Luis Kugelmeier, Cristhian Ricardo Loayza Loayza, João Carlos Ferreira, Maria Veronica Goncalves Rodrigues, Rute Sayuri Kano, Isaac Araújo Furtado, Jacyara Dalylla da Silva Nunes, Jhonatan Peres de Sousa, Marcos Natan da Silva Lima, Eden Santos Silva, Gedeon Silva Reis, Samuel Filgueiras Rodrigues   +15 more
wiley   +1 more source

Chamber Pressure Prediction and Parameter Optimization for Earth Pressure Balance Shields Based on SSA-RF and PSO

Applied Sciences
To address the problems of complex influencing factors of chamber pressure and delayed response in manual regulation during shield construction, this study proposes a chamber pressure prediction and parameter-optimization method integrating SSA-RF and ...
Changchun Gou, Yang Luo, Yijie Zhang, Xiaoyu Wang, Hongbiao Yu, Yaming Zhang   +5 more
doaj   +1 more source

Investigation of Resonance Characteristics of More Than 10 000 Metal‐Coated Silicon MEMS Cantilevers Using Machine Learning

Advanced Engineering Materials, EarlyView.
More than 10 000 metal‐coated silicon MEMS cantilevers are fabricated and characterized to build a large‐scale experimental dataset spanning multiple vibrational modes. Machine learning algorithms are benchmarked to predict resonance frequency and quality factor, with ensemble based models achieving accuracy approaching experimental uncertainty.
Sina Zare Pakzad, Saurabh Thorat, Andre Loch Gesing, Dominik Huber, Christopher Zellner, Patrick Egger, Georg Pfusterschmied, Ulrich Schmid, Michael Schneider   +8 more
wiley   +1 more source

Adjusting Nucleation Chemistry for the Atomic Layer Deposition of Antimony Selenide on Metal Oxide Surfaces

Advanced Engineering Materials, EarlyView.
The ALD precursor bis(trimethylsilyl)selenide is simultaneously a substrate surface inhibitor. It allows for the growth of Sb2Se3 in combination with tris(dimethylamido)antimony, but also silylates surface hydroxyl groups on the substrate if such hydroxyls are present.
Pei‐Chun Liao, Klaus Götz, Johannes Will, Mingjan Wu, Martin Dierner, Patrick Duchstein, Dirk Zahn, Tobias Unruh, Erdmann Spiecker, Julien Bachmann   +9 more
wiley   +1 more source

Low-pressure fabric hyperbaric chambers

South African Medical Journal, 2019
Hyperbaric oxygen therapy is defined as an intervention in which an individual breathes near 100% oxygen while wholly enclosed inside a hyperbaric chamber at a pressure ≥1.4 atmosphere absolute (ATA). The Southern African Underwater and Hyperbaric Medical Association (SAUHMA)-approved indications commence at pressures ≥2 ATA.
openaire   +4 more sources

Influence of Fe Particle Size Distribution on Chemical Homogeneity, Microstructure, and Crack Formation in Fe–SiC Powder Blends Processed by PBF‐LB/M

Advanced Engineering Materials, EarlyView.
The influence of Fe particle size on in situ alloying of Fe–SiC powder blends in PBF‐LB/M is revealed. Contrary to expectations, the coarser Fe fraction provides a broader crack‐free processing window and slightly improved elemental homogeneity while producing higher but more variable hardness. The results highlight a complex trade‐off between particle
Anna Luise Strauch, Anastasiya Toenjes, Matthias Steinbacher   +2 more
wiley   +1 more source

Earth Chamber Pressure Prediction Method for Earth Pressure Balance Shield Based on LSTM-DNN Fusion Model

Chengshi guidao jiaotong yanjiu
［Objective］Earth chamber pressure is a key parameter for EPB (earth pressure balance) shield construction assessment. Accurate prediction of earth chamber pressure helps construction technicians take timely control measures to ensure subway tunnel ...
WANG Bozhi, HUANG Yongliang, CHEN Wenming, DING Shuang, LIU Hao, LIU Xue-zeng, PENG Zihui, WU Weifeng, WANG Jiaye   +8 more
doaj   +1 more source